113 lines
3.4 KiB
Lua
113 lines
3.4 KiB
Lua
describe('BehaviorSubject', function()
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describe('create', function()
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it('returns a BehaviorSubject', function()
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expect(Rx.BehaviorSubject.create()).to.be.an(Rx.BehaviorSubject)
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end)
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it('sets the initial value based on the arguments', function()
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local subject = Rx.BehaviorSubject.create(1, 2, 3)
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expect({subject:getValue()}).to.equal({1, 2, 3})
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end)
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end)
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describe('subscribe', function()
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it('returns a Subscription', function()
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local subject = Rx.BehaviorSubject.create()
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local observer = Rx.Observer.create()
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expect(subject:subscribe(observer)).to.be.an(Rx.Subscription)
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end)
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it('accepts 3 functions as arguments', function()
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local onNext, onCompleted = spy(), spy()
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local subject = Rx.BehaviorSubject.create()
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subject:subscribe(onNext, nil, onCompleted)
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subject:onNext(5)
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subject:onCompleted()
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expect(onNext).to.equal({{5}})
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expect(#onCompleted).to.equal(1)
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end)
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it('calls onNext with the current value', function()
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local subject = Rx.BehaviorSubject.create()
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local observer = Rx.Observer.create()
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local onNext = spy(observer, '_onNext')
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subject:onNext(5)
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subject:subscribe(observer)
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expect(onNext).to.equal({{5}})
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end)
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end)
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describe('onNext', function()
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it('pushes values to all subscribers', function()
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local observers = {}
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local spies = {}
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for i = 1, 2 do
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observers[i] = Rx.Observer.create()
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spies[i] = spy(observers[i], '_onNext')
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end
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local subject = Rx.BehaviorSubject.create()
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subject:subscribe(observers[1])
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subject:subscribe(observers[2])
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subject:onNext(1)
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subject:onNext(2)
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subject:onNext(3)
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expect(spies[1]).to.equal({{1}, {2}, {3}})
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expect(spies[2]).to.equal({{1}, {2}, {3}})
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end)
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it('can be called using function syntax', function()
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local observer = Rx.Observer.create()
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local subject = Rx.BehaviorSubject.create()
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local onNext = spy(observer, 'onNext')
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subject:subscribe(observer)
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subject(4)
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expect(#onNext).to.equal(1)
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end)
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it('sets the current value', function()
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local subject = Rx.BehaviorSubject.create()
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subject:onNext(1, 2, 3)
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expect({subject:getValue()}).to.equal({1, 2, 3})
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subject:onNext(4, 5, 6)
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expect({subject:getValue()}).to.equal({4, 5, 6})
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end)
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end)
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describe('onError', function()
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it('pushes errors to all subscribers', function()
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local observers = {}
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local spies = {}
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for i = 1, 2 do
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observers[i] = Rx.Observer.create(nil, function() end, nil)
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spies[i] = spy(observers[i], '_onError')
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end
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local subject = Rx.BehaviorSubject.create()
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subject:subscribe(observers[1])
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subject:subscribe(observers[2])
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subject:onError('ohno')
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expect(spies[1]).to.equal({{'ohno'}})
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expect(spies[2]).to.equal({{'ohno'}})
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end)
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end)
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describe('onCompleted', function()
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it('notifies all subscribers of completion', function()
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local observers = {}
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local spies = {}
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for i = 1, 2 do
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observers[i] = Rx.Observer.create(nil, function() end, nil)
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spies[i] = spy(observers[i], '_onCompleted')
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end
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local subject = Rx.BehaviorSubject.create()
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subject:subscribe(observers[1])
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subject:subscribe(observers[2])
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subject:onCompleted()
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expect(#spies[1]).to.equal(1)
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expect(#spies[2]).to.equal(1)
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end)
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end)
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end)
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